Silicon wafers

Roughly what size in inches is a silicon wafer 300 mm in diameter commonly called?

  1. A12-inch
  2. B6-inch
  3. C8-inch
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Answer: A. 12-inch

One inch is about 25.4 mm, so 300 mm is about 11.8 inches, and it is commonly called a "12-inch wafer". 200 mm wafers are called 8-inch and 150 mm wafers 6-inch.

  • A. Correct. 300 mm is called 12-inch.
  • B. 6-inch refers to 150 mm wafers.
  • C. 8-inch refers to 200 mm wafers.
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More Silicon wafers questions

  1. What is the cylindrical block of single-crystal silicon grown by the CZ method or similar, before it is cut into wafers, called?
  2. What is the main reason silicon wafers are round?
  3. Which pair of Japanese companies holds a large share of the global silicon wafer market?
  4. In the CZ method, what is the purpose of growing a thin neck just after the seed crystal at the start of pulling (necking)?
  5. What causes "slip", a problem when large-diameter wafers are heat-treated at high temperature?